we will be traveling to wdw in november. we have a 5 year old who weighs about 40 pounds, also our friends have a 7 year old who weighs about 75 lbs. do the strollers you can rent at the parks hold children of these sizes? are they bulky? how much do they cost? anyone have recommendations on wether to bring a cheep umbrella stroller or rent one at the parks? if we bring an umbrella stroller are there lockers we can rent that would hold it till we needed it? HELP!!! thanks - these boards are great - i'm starting to get really excited, first time ever that i want winter time to come fast!